Attachment for lathes.



.No. 861,641. PATENTED JULY 30, 1907.

R. F. DEVINE.

ATTACHMENT FOR LATHES.

APPLICATION FILED AUG. 26, 1904.

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PATENTED JULY so, 1907.

R. P. DBVINE. ATTACHMENT FOR LATHE-S.

APPLICATION FILED A UG.26, 1904.

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INVENTOR ROBERT F. DEVINE, OF ERIE, PENNSYLVANIA.

ATTACHMENT FOR LATHES.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed August 26, 1904 Serial No. 222,206.

To all whom it may concern:

Be it known that I, ROBERT F. DEVINE, of Erie, in the county of Erie and State of Pennsylvania, have invented a new and useful Improvement in Attachments for Lathes, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a plan view illustrating my invention,

Fig. 2 is a side elevation of the same; Fig. 3 is an end elevation showing the face-plate; and Fig. 4 is an end elevation showing the boxed arm on the end of a tail spindle. I

Like symbols of reference indicate like parts wherever they occur.

My invention relates to an attachment for lathes by means of which the wrist-pins of crank-shafts, and other articles of irregular shape, may be easily and rapidly turned; and it consists in devices which may be secured to and removed from any lathe, which devices are adapted to so hold the crank-shaft, or other article to be turned, that the wrist-pin may be rotated on the center or axis of the head and tail-spindle.

I will now describe my invention so that others skilled in the art to which it appertains may manufacture and use the same.

In the drawings, 2 represents the face-plate which may be secured to any form of lathe. In this face plate is a way 3 and fitting in the way 3 is a tongue 4 on a bracket 7 which is thus adjustably secured to the lace-plate 2 and is fastened by bolts 5 passing through elongated bolt-openings 6. One of these bolts, marked 5, is in the form ofa box or nut 30, having threaded ends so provided with nuts 31 at each end that the bracket 7 may be secured in the desired position of adjustment. In order to adjust the bracket 7, an adjusting screw33 passes through a bearing at 34 in the body of the face plate and through a threaded cavity in the nut 30, and thus by turning the screw the nut 30 carrying the bracket 7 may be raised or lowered. When the bracket has been adjusted the bolts in the other bolt openings 6 which are ordinary bolts are tightened to firmly secure the bracket to th e face plate. This bracket is provided withclamps adapted to securely hold the crank-shaft, one portion of whichclamps is formed by two blocks 8 integral with the body of the bracket and having V-shaped recesses 8. In front of the end block are two jaw or blocks 9 which move on the threaded bolt. 10, which bolt passes through bolt-openings in the bracket, and by means of which jaws the cheek of the crank-shaft may be gripped and held, thus forming the drive in the rotation of the crank-shaft. The other portion of these clamps8 is formed by the threaded bolts 11 which pass through threaded openings in the cross-bars 12 which extend between the upper portion of studs 13 that extend from the bracket 7. These bolts 11 are adapted to bear on the crank-shaft directly on a radial line with the radius of the face-plate and on a line with the apex of the recesses in the blocks 8. By means of the bolts 5 the bracket may be so adjusted on the face-plate 2 as to bring the blocks 8 at the distance from the center of the plate to correspond .with the distance between the crank-shaft and the center of the wrist-pin to be turned; These parts together constitute an attachment which is adapted to secure the crank-shaft to the face-plate of the lathe, which attachment maybe readily removed to permit the lathe to be used for other purposes.

Secured to the tail-spindle of the lathe is a boxed arm 15 which is provided with a clamp composed of two blocks, 16, 17 which blocks are so fitted in the way 18 as to be capable of adjustment. In these blocks is the gripping-cavity or jaws 19 and the blocks are separable from each other, the separation being controlled by the screw 20 which enables the separation and closing of the jaws in receiving and gripping the end of the crank-shaft. This screw 20 which is similar to the screw 30, already described, also serves to adjust the blocks 16 and 17 in the way 18. These blocks 16 and 17 are also provided with screws 21 which are pivoted to the block 16 at b, and are adapted to swing into slotted bolt-openings 22 in the blocks 16 and 1.7. When it is desired to open the clamp, these screws 21 are loosened and then swung aside on their pivots, which enables the block 17 to be separated from the block 16 by means of the screw 20. This clamp, composed of the blocks 1.6 and 17, may be fixed at any desired point in the way 18 by means of the bolt 25.

The boxed arm 15 is fitted on the end of the tailspindle 26 by means of a cast iron bushing 27 fixed in the boxed arm, which bushing fits over a brass sleeve 28 which is fixed on the end of the tail-spindle, the sleeve being provided with a flange 29.

The advantages of my invention will be appreciated by those skilled in the art. The attachment may be easily and rapidly fitted to any lathe, and when attached it enables the wrist-pins of crank-shafts to be turned very much more rapidly than has been possible heretofore.

What I claim and desire to secure by Letters Patent is:

1. In a lathe, a face plate having a way or guide, a

bracket fitting the way or guide, and movably fastened to the faceplate, and an adjusting screw for the bracket, said bracket having a drive clamp formed by laterally movable jaws arranged to grip and hold a check of a crankshaft, and radially acting shaft clamps carried by the bracket between the drive clamp and the face plate; substantially as described.

2. In a lathe, a face plate attachment, comprising a bracket having means whereby it may be adjustably connected to the face plate, said bracket also having recessed clamping blocks in line with each other, radial clamping bolts carried in bearings of the brackets, and cooperating with said blocks, laterally movable clamping blocks also carried in said bracket infront of the first named clamping blocks, and a clamping screw for said blocks substantially as described.

In a lathe, the combination with a tail-spindle of a boxed arm detachably secured thereto and having a way or guide therein, a pair of clamping blocks adjustably mounted in the way or guide, and a clamping screw for said 10 blocks, one of said blocks having screws pivoted thereto and arranged to swing into slotted bolt-holes in the blocks substantially as described.

In testimony whereof, I have hereunto set my hand.

v ROBERT F. DEVINE. Witnesses:

GEO. B. BLEMING, JOHN MILLER. 

